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More support for weak_import objective-c2 class. 

(radar 6815425).

llvm-svn: 89146
This commit is contained in:
Fariborz Jahanian 2009-11-17 21:37:35 +00:00
parent 6bf5305f5d
commit 6726055375
1 changed files with 27 additions and 0 deletions
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27
clang/lib/CodeGen/CGObjCMac.cpp
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@ -1170,6 +1170,9 @@ private:
/// legacy messaging dispatch.
llvm::DenseSet<Selector> NonLegacyDispatchMethods;
/// DefinedMetaClasses - List of defined meta-classes.
std::vector<llvm::GlobalValue*> DefinedMetaClasses;
/// LegacyDispatchedSelector - Returns true if SEL is not in the list of
/// NonLegacyDispatchMethods; false otherwise.
bool LegacyDispatchedSelector(Selector Sel);
@ -4130,6 +4133,25 @@ void CGObjCNonFragileABIMac::FinishNonFragileABIModule() {
AddModuleClassList(DefinedClasses,
"\01L_OBJC_LABEL_CLASS_$",
"__DATA, __objc_classlist, regular, no_dead_strip");
bool hasWeakImport = false;
for (unsigned i = 0; i < DefinedClasses.size(); i++) {
llvm::GlobalValue *IMPLGV = DefinedClasses[i];
if (IMPLGV->getLinkage() != llvm::GlobalValue::ExternalWeakLinkage)
continue;
IMPLGV->setLinkage(llvm::GlobalValue::ExternalLinkage);
hasWeakImport = true;
}
if (hasWeakImport) {
for (unsigned i = 0; i < DefinedMetaClasses.size(); i++) {
llvm::GlobalValue *IMPLGV = DefinedMetaClasses[i];
if (IMPLGV->getLinkage() != llvm::GlobalValue::ExternalWeakLinkage)
continue;
IMPLGV->setLinkage(llvm::GlobalValue::ExternalLinkage);
}
}
AddModuleClassList(DefinedNonLazyClasses,
"\01L_OBJC_LABEL_NONLAZY_CLASS_$",
"__DATA, __objc_nlclslist, regular, no_dead_strip");
@ -4419,6 +4441,8 @@ void CGObjCNonFragileABIMac::GenerateClass(const ObjCImplementationDecl *ID) {
std::string SuperClassName =
ObjCMetaClassName + ID->getClassInterface()->getSuperClass()->getNameAsString();
SuperClassGV = GetClassGlobal(SuperClassName);
if (ID->getClassInterface()->getSuperClass()->hasAttr<WeakImportAttr>())
SuperClassGV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage);
}
llvm::GlobalVariable *CLASS_RO_GV = BuildClassRoTInitializer(flags,
InstanceStart,
@ -4427,6 +4451,7 @@ void CGObjCNonFragileABIMac::GenerateClass(const ObjCImplementationDecl *ID) {
llvm::GlobalVariable *MetaTClass =
BuildClassMetaData(TClassName, IsAGV, SuperClassGV, CLASS_RO_GV,
classIsHidden);
DefinedMetaClasses.push_back(MetaTClass);
// Metadata for the class
flags = CLS;
@ -4444,6 +4469,8 @@ void CGObjCNonFragileABIMac::GenerateClass(const ObjCImplementationDecl *ID) {
std::string RootClassName =
ID->getClassInterface()->getSuperClass()->getNameAsString();
SuperClassGV = GetClassGlobal(ObjCClassName + RootClassName);
if (ID->getClassInterface()->getSuperClass()->hasAttr<WeakImportAttr>())
SuperClassGV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage);
}
GetClassSizeInfo(ID, InstanceStart, InstanceSize);
CLASS_RO_GV = BuildClassRoTInitializer(flags,